| Month | Temp. (min) | Temp. (max) | Temp. (avg) | Precipitation |
| January | 28°F | 50°F | 37°F | 3.0" |
| February | 28°F | 52°F | 39°F | 2.3" |
| March | 37°F | 62°F | 48°F | 3.4" |
| April | 45°F | 73°F | 59°F | 3.8" |
| May | 54°F | 79°F | 66°F | 4.2" |
| June | 63°F | 87°F | 74°F | 5.0" |
| July | 66°F | 89°F | 77°F | 4.8" |
| August | 65°F | 88°F | 76°F | 3.7" |
| September | 58°F | 82°F | 69°F | 4.0" |
| October | 47°F | 72°F | 59°F | 4.2" |
| November | 36°F | 62°F | 48°F | 3.2" |
| December | 31°F | 53°F | 41°F | 3.7" |
| Index | Penhook | Virginia | National |
| Air quality index | 38 | 58 | 42 |
| Pollution index | 3,888,220 | 1,561,881 | 2,726,193 |
| Measurement | Total |
| Days measured | 365 |
| Days with good air quality | 326 |
| Days with moderate air quality | 39 |
| Days w/ poor A.Q. for sensitive groups | 0 |
| Days with unhealthy air quality | 0 |
| Pollutant | Total |
| Arsenic | 0.070% |
| Benzene | 0.040% |
| Carbon Tetrachloride | 0.002% |
| Lead | 0.040% |
| Mercury | 0.060% |
| City | Population | Air Quality Index | National Avg. |
| Chatham, VA | 1,756 | 26 | 48.0% |
| Union Hall, VA | 1,041 | 38 | 24.0% |
| Henry Fork, VA | 1,147 | 38 | 24.0% |
| Westlake Corner, VA | 1,748 | 38 | 24.0% |
| North Shore, VA | 3,075 | 38 | 24.0% |
| Penhook, VA | 1,347 | 38 | 24.0% |
| City | Population | Air Quality Index | National Avg. |
| Ardmore, AL | 1,347 | 44 | 12.0% |
| Colchester, IL | 1,347 | 29 | 42.0% |
| Hanna City, IL | 1,347 | 41 | 18.0% |
| La Crosse, KS | 1,347 | 15 | 70.0% |
| Brewster, MA | 1,347 | 36 | 28.0% |
| Penhook, VA | 1,347 | 38 | 24.0% |
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